The 8.8" rear of the Lincoln Mk VII is a coil-spring suspended rear end just like the '87-'93 Fox Mustangs. More or less, this rear end is a direct swap from the Lincoln to the Fox Mustang.
To put the entire coil-spring 8.8" rear under a vintage Mustang would take some doing to modify the housing in order for it to fit.
On the other hand, it just so happens that the discs can be taken from the Mk VII and adapted to the 8- & 9-inch rear end housings of the early Mustangs with some conversion brackets I had designed and now sell.
For more information on this Mk VII rear disc swap, you can check out these links: http://www.ultrastang.com/Ultrainfo.asp?Page_ID=11 http://www.ultrastang.com/Ultrainfo.asp?Page_ID=14